1*8a272653SPeter Holm#!/bin/sh 2*8a272653SPeter Holm 3*8a272653SPeter Holm# 4*8a272653SPeter Holm# Copyright (c) 2009 Peter Holm <pho@FreeBSD.org> 5*8a272653SPeter Holm# All rights reserved. 6*8a272653SPeter Holm# 7*8a272653SPeter Holm# Redistribution and use in source and binary forms, with or without 8*8a272653SPeter Holm# modification, are permitted provided that the following conditions 9*8a272653SPeter Holm# are met: 10*8a272653SPeter Holm# 1. Redistributions of source code must retain the above copyright 11*8a272653SPeter Holm# notice, this list of conditions and the following disclaimer. 12*8a272653SPeter Holm# 2. Redistributions in binary form must reproduce the above copyright 13*8a272653SPeter Holm# notice, this list of conditions and the following disclaimer in the 14*8a272653SPeter Holm# documentation and/or other materials provided with the distribution. 15*8a272653SPeter Holm# 16*8a272653SPeter Holm# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 17*8a272653SPeter Holm# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18*8a272653SPeter Holm# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19*8a272653SPeter Holm# ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 20*8a272653SPeter Holm# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21*8a272653SPeter Holm# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22*8a272653SPeter Holm# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23*8a272653SPeter Holm# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24*8a272653SPeter Holm# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25*8a272653SPeter Holm# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26*8a272653SPeter Holm# SUCH DAMAGE. 27*8a272653SPeter Holm# 28*8a272653SPeter Holm 29*8a272653SPeter Holm# Test race between ISDOTDOT lookups and directory removal/rename 30*8a272653SPeter Holm 31*8a272653SPeter Holm# With lookup_shared=1 rename() will fail from time to time with ENOENT and 32*8a272653SPeter Holm# the following stat() will succed. 33*8a272653SPeter Holm 34*8a272653SPeter Holm# Test scenario by tegge 35*8a272653SPeter Holm 36*8a272653SPeter Holm. ../default.cfg 37*8a272653SPeter Holm 38*8a272653SPeter Holmhere=`pwd` 39*8a272653SPeter Holmcd /tmp 40*8a272653SPeter Holmsed '1,/^EOF/d' < $here/$0 > rename.c 41*8a272653SPeter Holmmycc -o rename -Wall rename.c || exit 1 42*8a272653SPeter Holmrm -f rename.c 43*8a272653SPeter Holm 44*8a272653SPeter Holmrm -rf /tmp/rename.dir.* 45*8a272653SPeter Holmfor i in `jot 10`; do 46*8a272653SPeter Holm for j in `jot 10`; do 47*8a272653SPeter Holm /tmp/rename & 48*8a272653SPeter Holm done 49*8a272653SPeter Holm for j in `jot 10`; do 50*8a272653SPeter Holm wait 51*8a272653SPeter Holm done 52*8a272653SPeter Holmdone 53*8a272653SPeter Holmrm -rf /tmp/rename.dir.* /tmp/rename 54*8a272653SPeter Holmexit 0 55*8a272653SPeter HolmEOF 56*8a272653SPeter Holm#include <err.h> 57*8a272653SPeter Holm#include <fcntl.h> 58*8a272653SPeter Holm#include <libgen.h> 59*8a272653SPeter Holm#include <stdio.h> 60*8a272653SPeter Holm#include <stdlib.h> 61*8a272653SPeter Holm#include <string.h> 62*8a272653SPeter Holm#include <sys/stat.h> 63*8a272653SPeter Holm#include <sys/types.h> 64*8a272653SPeter Holm#include <sys/wait.h> 65*8a272653SPeter Holm#include <time.h> 66*8a272653SPeter Holm#include <unistd.h> 67*8a272653SPeter Holm 68*8a272653SPeter Holm#define RUNTIME 30 69*8a272653SPeter Holm 70*8a272653SPeter Holmstatic char dir1[128]; 71*8a272653SPeter Holmstatic char dir2[128]; 72*8a272653SPeter Holm 73*8a272653SPeter Holmint 74*8a272653SPeter Holmmain(int argc, char **argv) 75*8a272653SPeter Holm{ 76*8a272653SPeter Holm time_t start; 77*8a272653SPeter Holm int status; 78*8a272653SPeter Holm struct stat sb; 79*8a272653SPeter Holm pid_t p; 80*8a272653SPeter Holm 81*8a272653SPeter Holm sprintf(dir1, "rename.dir.%d", getpid()); 82*8a272653SPeter Holm sprintf(dir2, "rename.dir.2.%d", getpid()); 83*8a272653SPeter Holm if (mkdir(dir1, 0700) == -1) 84*8a272653SPeter Holm err(1, "mkdir(%s)", dir1); 85*8a272653SPeter Holm 86*8a272653SPeter Holm if (chdir(dir1) == -1) 87*8a272653SPeter Holm err(1, "chdir(%s)", dir1); 88*8a272653SPeter Holm if ((p = fork()) == -1) 89*8a272653SPeter Holm err(1, "fork()"); 90*8a272653SPeter Holm if (p == 0) { 91*8a272653SPeter Holm setproctitle("child"); 92*8a272653SPeter Holm if (chdir("..") == -1) 93*8a272653SPeter Holm err(1, "chdir(%s)", ".."); 94*8a272653SPeter Holm start = time(NULL); 95*8a272653SPeter Holm while (time(NULL) - start < RUNTIME) { 96*8a272653SPeter Holm if (rename(dir1, dir2) == -1) { 97*8a272653SPeter Holm warn("rename(%s, %s)", dir1, dir2); 98*8a272653SPeter Holm stat(dir1, &sb); 99*8a272653SPeter Holm if (stat(dir1, &sb) == -1) 100*8a272653SPeter Holm err(1, "stat(%s)", dir1); 101*8a272653SPeter Holm else 102*8a272653SPeter Holm errx(1, "stat(%s) succeeded!", dir1); 103*8a272653SPeter Holm } 104*8a272653SPeter Holm if (rename(dir2, dir1) == -1) { 105*8a272653SPeter Holm warn("rename(%s, %s)", dir2, dir1); 106*8a272653SPeter Holm stat(dir2, &sb); 107*8a272653SPeter Holm if (stat(dir2, &sb) == -1) 108*8a272653SPeter Holm err(1, "stat(%s)", dir2); 109*8a272653SPeter Holm else 110*8a272653SPeter Holm errx(1, "stat(%s) succeeded!", dir2); 111*8a272653SPeter Holm } 112*8a272653SPeter Holm } 113*8a272653SPeter Holm _exit(0); 114*8a272653SPeter Holm } else { 115*8a272653SPeter Holm setproctitle("parent"); 116*8a272653SPeter Holm start = time(NULL); 117*8a272653SPeter Holm while (time(NULL) - start < RUNTIME) { 118*8a272653SPeter Holm if (stat("..", &sb) == -1) 119*8a272653SPeter Holm err(1, "stat(..)"); 120*8a272653SPeter Holm } 121*8a272653SPeter Holm } 122*8a272653SPeter Holm if (waitpid(p, &status, 0) == -1) 123*8a272653SPeter Holm err(1, "waitpid()"); 124*8a272653SPeter Holm if (chdir("..") == -1) 125*8a272653SPeter Holm err(1, "chdir(%s)", ".."); 126*8a272653SPeter Holm if (rmdir(dir1) == -1) 127*8a272653SPeter Holm err(1, "rmdir(%s)", dir1); 128*8a272653SPeter Holm 129*8a272653SPeter Holm return (0); 130*8a272653SPeter Holm} 131